after downloading themes and skins and all of that, how do they go onto the ipod? i figured out how to get the applications on (you just drag them into itunes) but how do you add the skins and themes and cool battery icons and all of that??

Themes and skins are not available through the App Store, nor are the apps that let you put them on your device. But, Summerboard and Customize (as far as I know) haven't been updated to work with 2.0 yet. When they are, you'll have to jailbreak your device.